ENMET Corporation PO Box 979 Ann Arbor, MI 48106-0979 Spectrum RAL Compressed Air Line Carbon Monoxide Monitor Instrument Manual 80002-033 07/10/96 MCN #189, 04/03/98 MCN #204, 10/20/98 MCN #218, 06/15/99 MCN #246, 12/28/00 MCN #258, 07/18/01 MCN #268, 11/05/01
Table of Contents 1.0 INTRODUCTION................................................................................................................................1 1.1 Unpack................................................................................................................................................................................ 1 1.2 Check Order................................................................................................................................................
SPECTRUM RAL ENMET Corporation 1.0 Introduction The SPECTRUM-RAL carbon monoxide monitor is a small 110 VAC operated instrument for the detection of carbon monoxide gas in compressed air lines. An electrochemical cell detects the gas, and the gas concentration is displayed on an LCD. Audio and visual alarms occur when the gas concentration exceeds a preset alarm point. At relatively low concentrations of CO, an alarm can be acknowledged, which results in the temporary cessation of the audio alarm.
ENMET Corporation SPECTRUM RAL 1.4 Check Instrument Turn the instrument ON, by plugging into a standard 110 VAC wall outlet and attach to your compressed air line system. In uncontaminated air, the display should read 0000 within ten seconds of turn-on. Check display operations by pressing the OPTION and SELECT switches as described in Figure 1. The SPECTRUM-RAL instrument is calibrated prior to shipment.
SPECTRUM RAL ENMET Corporation Enclosure Body Enclosure Cover Pushbutton Switches Sensor Housing (Sensor) OPTION SELECT Cover Screws 4 places Fitting (Tubing from Flowmeter) Display Visual Alarm Audio Alarm Power Cord Exterior View Tubing to Monitor Pressure Control Knob Flowmeter Regulator Ref: Fitting to Air line Gauge Flowmeter Valve Regulator with Flow meter Figure 1: SPECTRUM-RAL Features 3
ENMET Corporation SPECTRUM RAL 2.2 SPECTRUM-RAL Installation 2.2.1 Mount Enclosure Mount the enclosure at an appropriate location using the two mounting holes accessible inside the enclosure. See Figure 2. The location should be far enough upstream from the user that the sample air reaches the monitor before the air reaches the user. Mounting Holes 2 places Relay Contact Terminal Strip Figure 2: SPECTRUM-RAL Interior View 2.2.
SPECTRUM RAL ENMET Corporation 3.0 SPECTRUM-RAL Operation Plug the power supply into an 110 VAC outlet. The display should read "0000" within ten seconds when the monitor is supplied with uncontaminated air. 3.1 Operational Menu The operational menu flow diagram is shown in Figure 3. This menu is accessed with the OPTION pushbutton switch, the left hand switch as viewed from the front of the instrument.
ENMET Corporation SPECTRUM RAL 3.2 Gas Concentration Display and Alarms The LCD furnishes a numerical display of CO concentration from 0000 to 100 PPM. If the CO concentration exceeds 100 ppm, the display reads "100+." When the concentration of CO exceeds the preset alarm point, the audio and visual alarms are activated. The gas concentration continues to be displayed during alarm.
SPECTRUM RAL ENMET Corporation 3.5 Interference Gases Some gases other than CO cause a sensor response, and thus are termed "interference gases". Known interference gases are shown in Table 2. Table 2: Known Interference Gases Gas Hydrogen Nitric oxide Concentration in PPM 1,000 100 Reading in ppm 100+ 25 Table 3 shows levels of gases that are known to cause no sensor response.
ENMET Corporation SPECTRUM RAL 4.0 Maintenance 4.1 Maintenance Menu From the gas concentration numerical display, push the OPTION button four times; "go SETUP" is displayed. This is the entrance to the maintenance menu. The maintenance menu flow diagram is shown in Figure 4.
SPECTRUM RAL ENMET Corporation 4.2 Key Entrance to the maintenance menu is guarded with a four digit numerical key. The factory default setting of the key is 1270. When the valid numerical key is inserted, the user is allowed to enter the maintenance menu. When in the "go SETUP" location, press the SELECT pushbutton; "Key=0000" is displayed. The underscore cursor is under the left hand digit.
ENMET Corporation SPECTRUM RAL 4.5 Changing the Alarm Level A valid key entry sets the instrument at the "run ZERO" location of the maintenance menu. Press the OPTION push button twice to access the "set ALM" display, then press the SELECT button; ALM=0000" is displayed. This is called the alarm update window, and the value displayed is the present alarm setpoint. The underscore cursor is under the far left digit.
SPECTRUM RAL ENMET Corporation 5.0 Replacement Part Numbers ENMET replacement part numbers: Description Part Number Calibration Kit Calibration Cup Calibration Gas, 20 ppm CO Zero Gas, 20.
ENMET Corporation SPECTRUM RAL 6.0 WARRANTY ENMET warrants new instruments to be free from defects in workmanship and material under normal use for a period of one year from date of shipment from ENMET. The warranty covers both parts and labor excluding instrument calibration and expendable parts such as calibration gas, filters, batteries, etc... Equipment believed to be defective should be returned to ENMET within the warranty period (transportation prepaid) for inspection.
SPECTRUM RAL ENMET Corporation Appendix A The Characteristics and Effects of Carbon Monoxide Carbon monoxide is a colorless odorless toxic gas generated by incomplete combustion of a hydrocarbon fuel in air. It may be present where internal combustion engines, furnaces, boilers, and other combustion devices are present. It is toxic when inhaled because of its great affinity to hemoglobin, the oxygen carriers in the red cells of the blood.
